Training Examination & Certification Requirement:
During this Bubble Leak Testing - Vacuum Box Technique training classes, you will give examination in General theory, Specification, and Practical. You are required to successfully pass these three examinations with minimum of 70% grading in each examination and average grading of all three examinations should be 80% minimum as per the requirement of ASNT SNT-TC-1A 2016.OJT Hours: As per requirements of ASNT SNT-TC-1A, you need to have a minimum of 38 Hours on-job training (OJT) after completion of training classes for certification in this method.

Basic Principle of Bubble Leak Testing - Vacuum Box Technique

In Bubble Leak Testing (BLT), a gas pressure differential is established across a pressure boundary to be tested. A test liquid is then applied in contact with the lower pressure side of the pressure boundary. Gas leakage through the pressure boundary can then be detected by observation of bubble formed in the detection liquid at the exit points of leakage through pressure boundary. This technique provides immediate indications of the large leaks , 10^-3 to 10^-5 Pa.m^3.s^-1 or (10^-2 to 10^-4 std.cm ^3.S-1)

Course Description:

Bubble Leak Testing Theory

Application of Vacuum Box Technique

Test Preparation of Vacuum Box Technique

Examination, Interpretation, and Evaluation of Leaks Receiver

Report and Specification

Hands-on Training (Practical) Outlines:

Test Setup and Calibration

Surface Preparation

Application of Pressure

Application of Bubble Solution

Application vacuum Box and Examination of Test Part

Flaw Interpretation and Evaluation

Training MaterialTraining Course material is supplied at the start of training and divided into different sections followed by practice worksheets and quizzes. Training books also include some referencing code & specifications for examination procedure and for acceptance.Referencing Code and Standards: